한국섬유공학회지 (Textile Science and Engineering)

  • 제50권4호
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  • Pages.258-265
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  • 2013
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  • 1225-1089(pISSN)
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  • 2288-6419(eISSN)
한국섬유공학회 (The Korean Fiber Society)
권호 표지
DOI QR코드

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이소프로필 작용기가 그라프트된 폴리우레탄 공중합체의 분자간 인력 조절

Controlling Molecular Interactions between Polyurethane Copolymers by Grafting Isopropyl Functional Groups

  • 정용찬 (수원대학교 자연과학대학 화학과) ;
  • 최재원 (인제대학교 나노공학부) ;
  • 이혜림 (수원대학교 자연과학대학 화학과) ;
  • 전병철 (인제대학교 나노공학부)
  • 투고 : 2013.06.12
  • 심사 : 2013.08.06
  • 발행 : 2013.08.31
⟨ 이전 논문 다음 논문 ⟩

초록

Grafted isopropyl groups were used to control the molecular interactions between polyurethane (PU) copolymers, and their effect on the tensile properties of PU was investigated. The grafted isopropyl groups were selected to interrupt the molecular interactions and disturb the close contact between PU chains through its branched structure, and thus improve the low-temperature recovery while maintaining the high tensile properties and the shape recovery at ambient temperature. The grafted isopropyl groups made a difference to the phase separation of the hard and soft segments in the PU structure, as determined by IR and DSC. The crosslink density and viscosity experienced an unusual increase with the increase in isopropyl content owing to crosslinking by the grafting reagent. The shape recovery and retention remained high even with the grafted isopropyl groups. Finally, the effect of the isopropyl groups on low-temperature recovery was compared with that of the linear PU, and the reason for the flexibility is discussed.

키워드

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